Gtx 335R/Gtrx 345R Transponder; Gdc 7400 Air Data Computer - Garmin G1000 Nxi System Maintenance Manual

GTX 335R/GTRX 345R Transponder

GTX 335R/GTX 335R Removal:
Gain access to the avionics shelf in the tail area.
1.
Insert a 3/32" hex drive tool into the access hole in the front of the unit.
2.
Turn hex drive tool counterclockwise until the hex drive tool stops.
3.
Pull the unit from the rack using the spring-loaded tab on the front of the unit.
4.
GTX 335R/GTX 335R Reinstallation:
Visually inspect the connectors in the back of the rack to ensure there are no bent or
1.
damaged pins. Repair any damage if found.
Insert a 3/32" hex drive tool into the access hole in the front of the unit.
2.
Turn hex drive tool counterclockwise until the hex drive tool stops.
3.
Slide the unit in the rack until it stops. The unit will appear to stick out of the rack
4.
approximately 3/8".
Insert a 3/32" hex drive tool into the access hole in the front of the unit.
5.
Push on the left side of the unit and turn hex drive tool clockwise until it stops. Do not
6.
apply more than 8 in-lbs of torque on the hex tool to seat the unit.
Configure and test the GTX 3000 according to Section 7.5.
7.

GDC 7400 Air Data Computer

Removal:
1. Gain access by removing the appropriate GDU 1050A display unit (see Section 6.1.)
GDC 1 is located behind PFD1 and GDC 2 is located behind PFD2.
2. Disconnect the pitot/static plumbing from the rear of the unit. Disconnect the single
connector.
3. Loosen each thumbscrew on the hold-down clamp and remove the clamp.
4. Carefully remove the unit from its mount.
Reinstallation:
1. Inspect the connector and pins for damage. Inspect the pitot/static plumbing for
damage. Repair any damage.
2. Place the unit in the mounting tray. Position the locking clamp and fasten using the
thumbscrews.
3. Connect the backshell assembly and pitot/static plumbing to the unit.
4. Reinstall the GDU 1050A display unit.
5. Configure and test the GDC 7400 according to Section 7.7.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Page 232
Revision 1